Nipple-chuck.



No. 782,201. PATENTBD FEB. 7, 1905. A. W. MOGAHAN & O. K. ASCHBR.

NIPPLE CHUCK.

APPLIoATIoN FILED JUNB15, 1904.

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UNITED STATES PATENT Patented February '7, 1905.

ALEXANDER IV. McGAI-IAN AND OTTO K. ASCHER, OF LOS ANGELES, CALIFORNIA;SAID MCGAHAN ASSIGNOR TO B. l'I. CASS ANI) A. I. FLEMING, OF LOSANGELES, CALIFORNIA.

NIPPLE-CHUCK.

SPECIFICATION forming' part of Letters Patent No. 782,201, datedFebruary '7, 1905.

Application filed June l5, 1904. Serial No. 212,661.

To 117/ 'zr/1.07m ff 'muy concer/L.'

Be it known that we, ALEXANDER W. Mc- CrAHAN and OTTo K. AscrrER,citizens of the United States` residing' at Los Angeles, in the countyofLos Angeles and State of California, have invented new and usefulImprovements in Nipple-(lfhucks, of which the following is aspecification.

The primary object of our invention is to provide a device that willhold securely a nipple or short piece of pipe upon which it is desiredto place a thread or screw with the customary ap'- pliances for cutting'said screwe., a stock or die or thread-cutting' machine.

Another object is to provide a device that will prevent the nipple fromremaining in the die when said die is being reversed after said threadhas been cut upon said nipple.

Another object is to provide a device that will quickly and convenientlyrelease said nipple after the thread has been cut and the die has beenremoved.

A further object is to provide a device that will permit of either aright-hand thread or a left-hand thread being' cut upon such nipple orshort piece of pipe, at the same time retaining all the advantages abovementioned.

The accompanying drawings illustrate the invention.

Figure I is a longitudinal section of the device with a nipple heldtherein. Fig. 2 is a plan of the central g'ripping plug' or chuck. Fig.3 is a vertical section on the line X X in Fig. l. Fig. A is a sectionon the line X" X in Fig. l. Fig. 5 is a section through the gripping endof the device, showing the application of a reducing-bushing thereto.Fig. 6 is a perspective view of said bushing.

The invention comprises a case, barrel, or l cylinder I, a movable orrotative member 2 traveling upon and engaging with said barrel, as bymeans of a screw-thread connection, in such manner as to be advanced orretracted longitudinallyY of the barrel, and a central gripping plug orchuck 3 traveling' within said barrel and connected with said rotativemember to be advanced or retracted therewith, the said barrel beingprovided at its end with suitable means, such as a screw portion A,adapted to engage a nipple or pipe and hold it in position for thethread-cuttingoperation, and the central plug or chuck being' adapted toengage with the nipple to hold it from turning when it has been broughtto proper position.

The central plug' o1' chuck 3 is supported and guided within the barrel1 in such manner as to allow thc longitudinal movement of said plug',but to prevent rotation thereof relative to the barrel, and said plug orchuck is connected to the member 2 in such manner that longitudinalmovement of said member will be communicated to said plug. The member 2is preferably a hand-wheel turning upon the barrel 1 and engagingtherewith by a screwthreaded portion 5, working' upon the screwthread 6on the barrel. The connection between said hand-wheel and the centralchuck is by means of a pin 7, extending through a hole 8 in said centralchuck, through slots 9 in cach side of the barrel, and into an annularslot or groove l0 formed in the hand-wheel, so that as the hand-wheelrotates the annular slot of the liand\\'lieel, riding around over theends of the pin, will press the pin and chuck longitudinally one way orthe other. To enable the parts to be readily assembled, the outer wallof the annular slot or groove is formed by a removable plate II,fastened to the hand-wheel by screws A loose ring 13 placed at the innerside of said annular slot to serve as a wear-plate andantifri'ctionring.

The central chuck 3 is preferably cylimlrical to lit within the barrel Iand slide therein, and it is provided at its forward end with angularfaces M, preferably concaved, as shown in Fig. 3, to enable it to gripmore effectually the inner end of the nipple. The connection betweenthis plug and the hand-wheel is such that when the parts have beenbrought to g'ripping position rotative movement of the plug' in eitherdirection will result in a slight further advance of the plug so as toincrease the gripping action. For this purpose the hole 8 through saidchuck or plug is formed at its forward side with a double cam-face orbearing portion l5, reversely curved or inclined in each direction fromthe center so that as the plug turns in either direction from a centralposition (shown in Fig. 2) it will rise on the pin in such manner as tobe pressed forward, as indicated in dotted lines in Fig. 2. A spring 16is connected to the central plug orchuck in such manner as to tend torestore it to central position when released, said spring, for example,consisting of a stii' wire passing through the hole 17 in a stud 18,projecting from the rear end of said plug. The outer ends of said springextend into the guideslots 9 in the barrel. The rear side of hole 8 isso formed as to permit the movement of the plug straight across from oneside to the other without any material change in the lateral position ofthe plug.

The operation of the device is as follows: The wheel 2 is reversed, thusdriving the chuck back in the case or barrel. The nipple (indicated at20) is inserted by screwing into the end of the case or barrel two orthree threads or as far as is desired. Then the wheel is turned forward,thus advancing the chuck until a contact is made with the nipple. Thenanytendency to turn the nipple in either direction will cause the chuckto be pressed forward on account of its mounting the curved incline 15.After the thread has been cut on the nipple the reverse strain ofbacking the die ofiLA the nipple (or the nipple off the die) throws thechuck in a straight line over to the opposite wall of the curvedinclined hole, when again any tendency of the nipple to revolve willcause the chuck again to press forward farther into the nipple. Afterthe die is removed, in order to take out the nipple the wheel isreversed, thus driving' the chuck away from the nipple, when it canreadily be unscrewed. As soon as the tension is released from the chuckthe spring 16 throws the chuck back to its original position with thelowest point of the curved incline opposite the pin.

In order to provide for cutting smaller sizes of pipe than the one thatscrews into the case or barrel, we provide reducing-bushings 21,preferably of the design illustrated in Figs. 5 and 6 and provided withinterior and eX- terior threads 22 23, corresponding, respectively, tothread 4 and to the thread of the nippletobecut.Theinteriorofthebushingis shaped to conform to the shape of the point ofthe chuck, having cuts or notches 24: adapted to clear the biting edgesor corners 25 of the chuck, so that when a nipple is inserted into thebushing and there is -Contact between the chuck and the nipple there isno contact between the chuck and the bushing and so that the bushingcannot be screwed up with the nipple and can only be removed by furtherreversing the wheel.

The device may be variously modified without departing from ourinvention.

Wvhat we claim is l. In a nipple-chuck, a supporting member adapted toreceive and hold the end of a nipple, a chuck member movablelongitudinally in said supporting member, an operating member movablelongitudinally on the supporting member, a connection between saidoperating member and the chuck member to cause the longitudinal movementof said chuck member,

and means comprising engaging portions on the operating and chuckmembers, one of said engaging portions having reversely-inclinedcam-faces to cooperate with the other of suoli engaging portions forcausing advance of the chuck member on rotation thereof in eitherdirection.

2. In a nipple-chuck, a longitudinally-slotted barrel screw-threaded atthe end to receive and hold the end of a nipple, a member movable alongand rotatable around the barrel and having an annular groove, meansonthe barrel and member to cause 'movement of the member along the barrelon rotation of said member, a chuck member movable longitudinally withinthe barrel, and a pin engaging with said chuck member and extendingthrough the slotted barrel into engagement with the groove in therotating member.

3. In a nipple-chuck, a longitudinally-slotted barrel screw-threaded atthe end to receive and hold the end of a nipple, a member rotatable uponthe barrel and having an annular groove, means on the barrel and memberto cause movement of the member along the barrel on rotation of saidmember, a chuck member movable longitudinally within the barrel, and apin engaging with said chuck member and extending' through the slottedbarrel into engagement with the groove in the rotating member, the chuckmember having reverselyinclined cam portions engaged by said pin tocause advance ofthe chuck member on rotation thereof in eitherdirection.

4. In a nipple-chuck, a longitudinally-slotted barrel screw-threaded atthe end to receive and hold the nipple, an operative member rotatable onsaid barrel and having an annular groove, means on the barrel and memberto cause movement of the member along the barrel on rotation of saidmember, a chuck member movable longitudinally in the barrel, and havinga transverse hole formed with reversely-inclined cam-surfaces, and a pineX- tending through said hole and through the slots in the barrel intothe annular groove in the operating member.

5. In a nipple-chuck, the combination of a supporting member adapted toreceive and hold the end of the nipple, a chuck member movablelongitudinally in said member to engage the end of the nipple, a camconnection between said members to cause advance of the chuck member onrotation thereof in either direction from a central position, and meansfor returning the chuck member to central position.

6. In a nipple-chuck, a longitudinally-slot- IOO IIO

ted barrel adapted to receive and hold the end of a nipple, an operatingmember engaging by screw engagement with said barrel, a chuck membermovable longitudinally in the barrel, connecting means engaging with theoperating member and extending through the slotted barrel intoengagement with the chuck member to move the same longitudinally onrotation of the operating member, the chuck member being provided withreversely-inclined cam means engaging the connecting means to advancethe chuck member upon rotation thereof in either direction, andaspringengaging' with the chuck member and with the barrel to return the chuckmember to central position.

7. In a nipple-chuck, a longitudinally-slotted barrel adapted to receiveand hold the end of a nipple, an operating member engaging by screwengagement with said barrel, a chuck member movable longitudinally inthe barrel, connecting means engaging with the operating member andextending through the slotted barrel into engagement with the chuckmember to move the same longitudinally on rotation of the operatingmember, the chuck member being provided with reversely-inclined cammeans engaging the connecting means to advance the chuck member uponrotation thereof in either direction, and a spring engaging with thechuck member and with the slots in the barrel to return the chuck memberto central position.

In testimony whereof we have hereunto signed our names, in the presenceof two subscribing Witnesses, at Los Angeles, in the county of LosAngeles and State of California, this 7 th day of June, 1904.

ALEXANDER NV. MCGAHAN. OTTO K. ASCHER.

W'itnesses:

ARTHUR P. KNIGHT, JULIA TOWNSEND.

